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No. Hydrocarbons will burn without smoke when the hydrogen-to-carbon ratio exceeds 1/3 on a weight basis. Methane (CH4) H:C ratio is (4*1)/(12) = 1/3, where 1 is Atomic Mass of hydrogen and 12 is the atomic mass of carbon. While acetylene (C2H2) H:C ratio is (2*1)/(2*12)=1/12. Acetylene will burn with soot.

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17y ago

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